Chap 9 pt. 1

Question 1

Sarcolemma

Answer 1

cell membrane

Question 2

Sarcoplasm

Answer 2

cytoplasm

Question 3

Sacroplasmic reticulum

Answer 3

modified ER

Question 4

Muscle wapped in

Answer 4

endomysium

Question 5

Endomysium, Epimysium, Fascia come together to form

Answer 5

tendon

Question 6

CT around whole muscle

Answer 6

epimysium

Question 7

CT around fascicles

Answer 7

peromysium

Question 8

CT around cells

Answer 8

endomysium

Question 9

Nerves and blood cells penetrate _____ together and branch out through _____ and ______

Answer 9

epimysium
perimysium
endomysium

Question 10

Skeletal muclse cells are made up of a bundle of smaller rod like structures called

Answer 10

myofibrils (bundle of thick and thin filaments)

Question 11

Myofibrils are made up of even smaller structures/ proteins called

Answer 11

myofilaments

Question 12

T tubules

Answer 12

conduct waves of electrical activity

Question 13

dArk bands called

Answer 13

A fibres

Question 14

LiGHT bands called

Answer 14

i fibres

Question 15

Sacoplasmic Reticulum function to

Answer 15

store and release Ca ions

Question 16

Z lines

Answer 16

anchor thin filaments

Question 17

Protein titin

Answer 17

anchors thick filaments to Z line

Question 18

Thick filaments are made of protein ____

Answer 18

myosin

Question 19

• Actin
• Nebulin
• Tropomyosin
• Troponin

Answer 19

Thin filaments proteins

Question 20

Double-stranded

• produces 2 heads
• capable of using ATP

Answer 20

Myosin

Question 21

Binding site for myosin

Answer 21

Actin

Question 22

Cross bridge cycle steps

Answer 22

Myosin heads bind to Actin

1. Myosin cross-bridge attaches to actin
2. Working stoke – myosin pulls actin filament
3. New ATP attaches to myosin head
4. ATP splits and myosin head cocks back

Question 23

Where does th Ca++ come from to bind troponin and initiate the contraction?

Answer 23

cisternae of the SR